It is stated in the book that Weeden's grave has been dug up, body stolen and tombstone broken. Later
...Fred Lemdin, night watchman at Rhodes, declares it was mixed with something very like the skrieks of a man in mortal terror and agony
This happens when Charles
is still alive
but presumably before he forbids Curwen from digging up graves.
Is the quote above actually referencing Curwen summoning Ezra to torture him and revenge himself? If so, how come Charles,
who was still alive
allowed him to do so?